Yeah, in the 90s Microsoft was basically this unstoppable juggernaut that ruled the Desktop with an iron fist. The main cause of their decline was that a new m

Yeah, in the 90s Microsoft was basically this unstoppable juggernaut that ruled the Desktop with an iron fist. The main cause of their decline was that a new market appeared which they failed to capture - namely, the mobile market (as well as the server market that became dominated by Linux). For Facebook to suffer a similar fate, I would think some new type of market would need to appear that Facebook fails to capitalize on - but it's hard to think of an analogous "new market" that could appear that would fundamentally displace a social network in the way that mobile displaced/disrupted Desktop. Maybe VR? (Although Facebook is trying to get into that as well...) Still, from my perspective, Microsoft in the 90s seemed as unstoppable and ubiquitous as Facebook does today - actually, it seemed more unstoppable than Facebook, because back then we weren't yet used to the possibility of scrappy startups turning into billion dollar companies overnight.